Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5567224 | Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame Method of reducing metal oxide in a rotary hearth furnace (14) to make a feed stock for a refining vessel when manufacturing alloyed iron, alloyed steel or stainless steel. The rotary hearth furnace includes an annular inner refractory wall (32), an annul... | 10/22/1996 |
| 4557758 | Steelmaking process A process of making steel from solid metal iron-bearing materials, especially metal scrap, in an oxygen converter comprises heating and melting the charge by supplying a fuel and an oxidizing agent in the direction from the bottom upwardly and from the si... | 12/10/1985 |
| 4518422 | Process and apparatus for refining steel in a metallurgical vessel A process and apparatus for the desulphurization, deoxidation and purification of a metal melt is presented. The process is particularly well suited for use in a ladle during the refining of steel. The present invention comprises means for defining at the... | 05/21/1985 |
| 4477278 | Steelmaking process using calcium carbide as fuel Calcium carbide is efficiently and safely employed to provide heat to a steel melt during subsurface refining by providing the steel melt with acidic component(s) and/or oxidizable component(s), which when oxidized will yield acidic components, in a amoun... | 10/16/1984 |
| 4198229 | Method of dephosphorization of metal or alloy A carbon-unsaturated molten metal or molten alloy containing elements more oxidizable than iron such as chromium and silicon is dephosphorized by addition of a flux composition comprising calcium carbide and a halide of alkali earth metal such as calcium ... | 04/15/1980 |
| 4105439 | Method for production of refined steel In a method of producing successive heats of refined steel wherein successive charges of molten, impure iron are refined by oxygen in the presence of at least one flux to form molten, refined steel and liquid slag, followed by the separation of said molte... | 08/08/1978 |
